How wide can the Localiser signal range actually be?

How wide can the Localiser signal range actually be?

• A. 2° to 4° wide
• B. 3° to 6° wide
• C. 5° to 10° wide
• D. 1° to 2° wide

Answer: (B)

The Localiser signal is a critical component of the Instrument Landing System (ILS) used to guide aircraft during the approach and landing phases. The beam width of a Localiser signal typically ranges from 3° to 6°. This width allows for sufficient lateral guidance to help pilots align the aircraft with the runway centerline during an approach. The 3° to 6° width is designed to provide a balance between precision and the need for pilot situational awareness. A narrower beam can enhance accuracy, but a wider beam ensures that pilots still receive effective lateral guidance even if they are slightly off the ideal approach path. This can be particularly important in challenging weather conditions where visibility is low. This range allows for adequate lateral guidance without becoming excessively restrictive, helping to reduce the risk of deviation from the intended flight path while ensuring the Localiser system remains usable across a variety of operational scenarios.

The Localiser signal is a critical component of the Instrument Landing System (ILS) used to guide aircraft during the approach and landing phases. The beam width of a Localiser signal typically ranges from 3° to 6°. This width allows for sufficient lateral guidance to help pilots align the aircraft with the runway centerline during an approach.

The 3° to 6° width is designed to provide a balance between precision and the need for pilot situational awareness. A narrower beam can enhance accuracy, but a wider beam ensures that pilots still receive effective lateral guidance even if they are slightly off the ideal approach path. This can be particularly important in challenging weather conditions where visibility is low.

This range allows for adequate lateral guidance without becoming excessively restrictive, helping to reduce the risk of deviation from the intended flight path while ensuring the Localiser system remains usable across a variety of operational scenarios.